全文获取类型
收费全文 | 67篇 |
免费 | 2篇 |
国内免费 | 1篇 |
专业分类
化学 | 26篇 |
力学 | 7篇 |
数学 | 26篇 |
物理学 | 11篇 |
出版年
2021年 | 3篇 |
2020年 | 1篇 |
2019年 | 2篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2014年 | 2篇 |
2013年 | 8篇 |
2012年 | 3篇 |
2011年 | 6篇 |
2010年 | 4篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 4篇 |
2006年 | 2篇 |
2005年 | 3篇 |
2004年 | 2篇 |
2003年 | 1篇 |
2002年 | 3篇 |
2001年 | 3篇 |
2000年 | 1篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 1篇 |
排序方式: 共有70条查询结果,搜索用时 15 毫秒
11.
Nguyen Buong Nguyen Thi Hong Phuong 《Journal of Optimization Theory and Applications》2013,159(2):399-411
In this paper, in order to solve a variational inequality problem over the set of common fixed points of an infinite family of nonexpansive mappings on a real reflexive and strictly convex Banach space with a uniformly Gâteaux differentiable norm, we introduce two new implicit iteration methods. Their strong convergence is proved, by using new V-mappings instead of W-ones. 相似文献
12.
Sodium ion ordering on an in situ cleaved NaxCoO2 (x=0.84) surface has been studied by ultrahigh vacuum scanning tunneling microscopy at room temperature. Three main phases, with p(3 x 3), ( radical7 x radical7), and (2 radical3 x 2 radical3) hexagonal unit cells and a surface Na concentration of 1/3, 3/7, 1/2, respectively, were identified. One surprising finding is that Na trimers act as the basic building blocks that order in long range. The stability of Na trimers is attributed to the increased Na coordination with oxygen as indicated by ab initio calculations, and possibly at finite temperature by configuration entropy. 相似文献
13.
Colin J. Thompson Caixia Ding Xiaozhong Qu Zhenzhong Yang Ijeoma F. Uchegbu Laurence Tetley Woei Ping Cheng 《Colloid and polymer science》2008,286(13):1511-1526
Twelve novel poly(allylamine) (PAA)-based, comb-shaped amphiphilic polymers have been developed. Hydrophobic groups of cetyl,
palmitoyl and cholesteryl were randomly grafted to PAA and quaternisation was carried out on some modified polymers. Polymers
were characterised using 1H NMR, elemental analysis and differential scanning calorimetry. All polymers formed nano self-assemblies in the aqueous solution
with a positive zeta potential and were able to encapsulate a hydrophobic agent, methyl orange, in the core. The critical
aggregation concentration (CAC) and the microviscosity were found to be dependent on the polymer hydrophobicity. Being the
most hydrophobic polymer, cholesteryl-grafted PAA had the lowest CAC (0.02 mg mL−1) and the highest microviscosity. They appeared to form dense nanoparticles and were transformed into novel nanostructures
in the presence of free cholesterol. Palmitoyl-grafted polymers formed nanoparticles while cetyl-grafted polymers formed polymeric
micelles. The flexibility of cetyl chains possibly resulted in the formation of multicore polymeric micelles. 相似文献
14.
15.
A comprehensively theoretical model is developed and numerically solved to investigate the phase distribution phenomena in a two-dimensional, axisymmetric, developing, two-phase bubbly flow. The Eulerian approach treats the fluid phase as a continuum and solved Eulerian conservation equations for the liquid phase. The Lagrangian bubbles are tracked by solving the equation of motion for the gas phase. The interphase momentum changes are included in the equations. The numerical model successfully predicts detailed flow velocity profiles for both liquid and gas phases. The development of the wall-peaking phenomenon of the void fraction and velocity profiles is also characterized for the developing flow. For 42 experiments in which the mean void fraction is less than 20 per cent, numerical calculations demonstrate that the predictions agree well with Liu's experimental data. © 1997 by John Wiley & Sons, Ltd. 相似文献
16.
The purpose of this paper is to investigate the Tikhonov regularization method for solving a system of ill-posed equilibrium
problems in Banach spaces with a posteriori regularization-parameter choice. An application to convex minimization problems with coupled constraints is also given. 相似文献
17.
W. B. Tsai W. W. Lin C.‐C. Chieng 《Numerical Methods for Partial Differential Equations》2001,17(5):454-474
A design of varying step size approach both in time span and spatial coordinate systems to achieve fast convergence is demonstrated in this study. This method is based on the concept of minimization of residuals by the Bi‐CGSTAB algorithm, so that the convergence can be enforced by varying the time‐step size. The numerical results show that the time‐step size determined by the proposed method improves the convergence rate for turbulent computations using advanced turbulence models in low Reynolds‐number form, and the degree of improvement increases with the degree of the complexity of the turbulence models. © 2001 John Wiley & Sons, Inc. Numer Methods Partial Differential Eq 17: 454–474, 2001. 相似文献
18.
Cellulose - The textile bleaching process that involves hot hydrogen peroxide (H2O2) solution is commonly practised in cotton fabric manufacture. The purpose of the bleaching process is to remove... 相似文献
19.
Microsized 2D protein arrays immobilized by micro-stamps and micro-wells for disease diagnosis and drug screening 总被引:4,自引:0,他引:4
S C Lin F G Tseng H M Huang C Y Huang C C Chieng 《Fresenius' Journal of Analytical Chemistry》2001,371(2):202-208
A novel method of protein array immobilization, using micro stamps to pick up proteins from micro wells and deposit them on to a bio-absorption chip, has been developed. This method can potentially transfer several protein spots on to an organized array for applications such as disease diagnosis and drug screening by parallel biological or chemical processes. Fabrication of the micro stamp and the micro well arrays involves thick-photoresist lithography, bulk micromachining, and a molding process, whereas fabrication of the bio-absorption chip involves amino-modification by use of APTS (aminopropyItrimethoxysilane) and surface activation by use of BS3 (bis-sulfosuccinimidyl suberate). Successful transfer of protein on to the bio-absorption surface using the micro stamp-well array has been demonstrated. The size variation between different stamping spots has been shown to be less than 10%, and the APTS-BS3 surface has also been proved to bind the protein efficiently. Appreciable protein retention was achieved during 6-h washing, which shows the binding strength of the bio-absorption surface is sufficient for protein processing. 相似文献
20.
Nguyen Buong Vu Xuan Quynh Nguyen Thi Thu Thuy 《Journal of Fixed Point Theory and Applications》2016,18(3):519-532
In this paper, in order to solve a variational inequality problem over the fixed point set of a nonexpansive mapping on uniformly smooth or reflexive and strictly convex Banach spaces with a uniformly Gâteaux differentiable norm, we investigate an explicit iteration method, based on the steepest-descent and Krasnosel’skii–Mann algorithms. We also show that some modifications of the last and Halpern-type algorithms are special cases of our result. 相似文献